Composition of matter and method of



106. COMPOSlTlONS, (Cross Reierenca COATING 0R PLASTIC.

UNITED STATES PATENT OFFICE.

JAMES Q. DIXON, OF SAN FRANCISCO, CALIFORNIA.

SPECIFICATION forming part of Letters Patent No. 587,799, dated. August10, 1897. Application filed August 29, 1 896. Renewed June 21, 1897.Serial No. 642,010. (No specimens.)

To all whom it may concern.-

Be it known that I, J AMES-Q. DIXON, a citizen of the United States,residing in the city of San Francisco, State of California, haveinvented certain new and useful Improvements in the Treatment ofManufactured Glass Articles, more particularly incandescent electriclampsviz. the globes of same; and I do hereby declare the following tobe a full, clear, and exact description thereof.

It is found in practice that rays of light passing through glass globes,colored, ground, or frosted, in process of manufacture are absorbed andcounter-reflected to a greater or less extent and a portion lost forgeneral illuminating purposes, whereas light having passed through sucha globe and striking on small reflecting-surfaces immediatelv outsidesuch a globe will be divergently reflected and add to the generalilluminating power of the lamp, while the light will be generallydiffused and not be reflected in one direction more than in another.

The objects of the invention are to prevent absorption andcounter-reflection of light and to provide a globe in which thereflection and dispersion of light-rays will take place from the outsidesurfaces of particles outside the globes and in which the light will nothave .to pass through either colored or ground glass to any extent.

The invention consists, first, in a composition of matter for thedesignated purposes consisting of materials substantially as and in theproportions hereinafter specified, and, secondly, in the manner ofapplying the said composition of matter, thus comprising a method, whichmethod would be practicable only with the designated composition ofmatter or its equivalent.

The following are the ingredients used in the designated composition, ofmatter, taken in about the proportions set forth: solution of silicateof soda thirty-two ounces; solution of sllicate of potassai eightounces; silicate of iron, one ounce, an powdered glass, a sullicientquantity to give the desire opacity.

The method of using this composition of matter is as follows: The globeis thoroughly ter is nearly dry is brushed off, removing undetached orloosely adherent particles. It is then laid in one hand, more frostingthrown on, and the hand being lightly closed it is rotated therein bythe other hand, which operation presses a suitable quantity of the.loose frosting into that already attached to the globe and rounds upandv makes even the whole. The globe is then laid aside in a properplace to dry, and when perfectly dry it is rotated once more in thehand, brushed ofi, and is ready for attachment to the light by theordinary well-known socket or other suitable means.

The proportion of the silicate of iron to the mixed silicates of sodaand potassa may vary to a certain extent without material result.

of iron adds very materially to the desirable qualities of thecomposition, and being a silicate it assimilates itself readily to theother silicates in the composition.

While the described composition of'matter and method are particularlyadapted for use on electric lamps, it is evident that their use may bemuch more widely extended. I therefore do not desire to restrict the useof the invention to that particular article, as other articles of glassor equivalent materials may be similarly operated on.

I am aware that lamps and theirbulbs have been colored, stained, andfrosted in various ways, and such I do not desire to claim, broadly;but,

Having described my invention, what I claim as new, and desire to secureby Letters Patent, is

1. A composition of matter'for the purpose set forth, consisting of thefollowing ingredients in about the designated proportions, namely:spluti o n of silicate of soda, solution of siligate arporassa 'sineatmriron, and

. lfl-5s, bi' olfen into small fragments or reduced to a powder,substantially as specified.

2. The method of. applying the herein-descril 2d composition of matter,or its equivalent, to the surfaces of suitable articles, which methodconsists in applying the com covered with this mixture, and when thelat- 5o It is found by experience that the silicate position moist,permitting it fiearly to dry, ai'iicle isreadyforuse, substantiallyasspeciapplying a little more of the same material, fled. pressing itfirmly into that first applied, \vh ile rotating the article to get anequal thickness JAMES DIXOI\' 5 of the application around it andsmoothing \Vitnesses:

or leveling the surface thereof, then permit- FOREST P. TRALLES,

ting the whole to dry perfect-1y so that the WILLIAM A. THOMPSON, Jr.

